Method of molding glass containers



Dec. 1, 1931. PATTERSON 1,833,973"

METHOD OF MOLDING GLASS CONTAINERS Filed Feb. 5, 1951 521681 0 lalienson w W. I I anowwqo.

Patented Dec. 1,1931

l f "fuNirEa 301mm? rn'r'rnnson, OF. summon; MARYIQAN co.,.or BALTIMORE, MARYLA D nn'rrronorrnrommeemsssjcoivrkmnnsj I This invention relates to an improved method of molding glass bottles'and like containers and more especiallyto the formation-of oblong bottles, etc. 1 Inproducing an oblong container of glass-it has-beenthe practice heretofore to make: an elliptical. blank in amold the meeting faces of: themembers of which have been in a plane extending diags onally across-the cavity in whichthe blank is to be shaped. Thishas been done with the. idea that whem the blank is transferred to the finishing-mold, the ribs or seams produced by the blank mold will lie in the plane of the meeting faces of the finishing mold members. These faces extend diagonally across the cavity in the mold from one corner to another. Consequently when the blank is given its final shape in the finishing mold the ribs or seams first formed are supposed to be merged by outwardjpressure into the ribs or seams produced by thefinishing mold. These latter ribs are intended to extend along dia- V metrically opposed corners or angles of the blown.

In the accompanying drawings have been shown the several steps of the method whereby the improved glass containers can be produced', as well as certain steps heretofore followed which. have proven objectionable.

In said drawings:

Figure 1 is a View in diagram showing the positions of blanks in the blank mold and the finishing mold when the usual procedure is followed;

Figure 2 is an enlarged section through the usual elliptical blank showing the line of separation blank and 'blllkIQf the opposed? portions of the blank:

"f Figure?) is anselevation of anaobl'ong bottle pnoduced by the. method shown in Figure 1 -Figure 4 is aview similar'to Fignre 1? illus method constituting the present I trating the invention. l-. V q, Figure-J5 is 11131312111 vi'ewfiofa blank produced ldrtin carrying.- out the present initlhefbliaink m Figure aim; sti -ea are ashes Figure 7f is1an elevationgof the :bot-t'l'eu': a-

Prior-to the present invention, oblong ibot-f l .tlesvand. the like? have been blown' witlilthe a seam on: the finished article ex-tending idiagposedmornersr Theblankhas'beenfonned-Lin amoldiA the i1iembers2I-and i3 of whi'c'hzprovide {anellipti'cal cavity 4, the long diameter onallythereacross and:along diametricallyop I .53of which is disposedwobliquelyto the ing faces of the;rnoldmembers-.. The: gather has been: blown" inthis mold? and emu or lse-amsbfil have been produced where the members a 2'. and '3 come-together at 8. i As clearly shown iniFigureYQtthe:ribs

'6 are spaced laterally from the long "axis ofthe blank. Y v 11 Following theiformation of the blank 7 it has been transferred to theccavity; in the: finishing mold Qwhere' it.hasbeeifipositioned with the": seams orribs 6 located adj acentito the meeting Lfa'ces' 10; of the members i ofi the mold, which .fa'ces, i as shown in Figure; 1,. co-

'incideiwitlionezdiagonal of theb'mold cavity '11;- The blank: i's then; given; its ifina liblow so as to 'bevexp'anded againstrthewalls; of cavity lliandi produce afinished bottle. E

'theiribsfon'the blank jwereplacedz in. I

position adj acnt to'rtlieimeeting faces or the members: of mold; .8- it would: naturally I be supposed; thatithey" would 1 merge into :diagonalribs producedrby thefinishingfmold and be; concealedz therewith in the diametrically opposed'corner portions of thebottle but'ithas been found in=practice that such is not the case. .;On.the contrary the :ribs Shave drawn: laterally out 'of theplane' of'thezoor ners andhawe producedpa finishedbottle r .thellikei on NVh ch thezribsare formed-f; in;

formly adjacent to the, ribs.

' of the-bottle adjacent to thecorners, thereby- 'producing"'an objectionable, unsightly api pearance as shown at 12 on the bottle-13v in Figure13. Because of this objection and failure to discoverfthecause, many. manuface turers have'discontinued' the manufacturer of 14 of the blank which constitutethe shallow oblong bottles having cornerlseams andQhaVe.

yre e edii the. p a t cer f mak e o tl s wi'thmat'chiri'gmold'seains alongjthe center's I I "glass container which includes the step of forming a roundedjblank with I'lbS 6Xt-I1(l of the narrow sides.

- By careful study of the methodsofbottle manufacture I have found that'when a" blank is produced as in Figure-1 andthen trans-1 ferred to the finishing mold, those portions ends "of the halves formed in the respective Inold members 2; and "3 contain less metal than the'adj acent deeper ends 15 of the blank. Consequently during the transfer the shallow jportions 14'Will 'cool'and harden more-rapidly thanthe'deeperlportions l5.- i Therefore lwhentthe blank is blown'in'the finishing inold" I the chilled harder portions 14 willw'exert a restraining influence, on theribs 6, anddrag I thelnl ateral'ly out oftheplane of theynieet- I "ing facesflQ so that the objectionableresult" described and obtained? r .l t V -i "--'I he'-present invention has been evolved from a knowledge of the-foregoing conditions and for the purpose of correcting them.

shown in Figure 3 be by to insure uniform chilling of the blank at opposite sides ofgthe ribs,and thereafter ribs against opposedfiat Wallsof the cavity toobliterate said rib-3 without lateral distortion. t V j t,

' The inethod of producing "an -angular inglengthwise' of'th 'e' blank in the same plane With'the longest diameter of the blank therebyte insure uniform chillingiof the blank at opposite sides ofl the "ribs, and thereafter I thereby to produce straight corner ribs 011 obliterate said ribswithout lateral distortion. I Intest mony thatly'claimthe foregoing EItQincludesrgtthe step of forming theblank in j a mold: 16' the Ineetingfaces ,17 of which coincide with the long diameter of; the blank i -185LThe ribs19' liein the same plane with '7 "the'long diameterof theelliptical blank and said blank is of the same proportions at both sides gof the :rib: n Thus during the. transfer l (ofthe' blank'it will chill-and harden uni v The blankthus produced is next placed in the finishing mold 20 at such an angle that long diameter 2110f the :cavity 22 whichis disposed obliquely to the plane of themeetribs'1'9'by flattening thenr againstthe adjacent: walls of the mold-As the lateral I stresses are :equal at both sides of; each rib, no wavedreifect willbe produced and the ribs 24* which :are produced by the finishing mold will 'beni'erged 'intojthe corners of the'finished container '25 and extend straight therealong.

5 What is'claimedis: .r

inglength'wiseof the blank'inthe same plane with thelongitudin'alaxis of the ellipse there'- its' ribswill'lie in the same-plane-with'the 2 blowing the blank inan angular cavity di-- I vided diagonally' ofthe cavity; and blank,

l w 11.; The Zm'ethod ..of producing? 

